Robert Kinelski (born January 27, 1981) is an American mixing engineer, engineer, and record producer. He is best known for his engineering and mixing work for Billie Eilish, Finneas, Lil Dicky, Big Sean, Karol G, Joji, Beyoncé, and more. In 2020, Rob won four Grammy Awards, including Record of the Year, Album of the Year, Best Pop Vocal Album, and Best Engineered Album, Non-Classical for mixing Billie Eilish's debut album When We All Fall Asleep, Where Do We Go?.